Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"catalyst activation"”.
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Catalytic activation of Rh,Pd nanoclusters supported on Ceria
Rh,Pd/CeO2 nanocatalysts exhibit excellent activity and stability for ethanol steam reforming (ESR) at 400°C. This thesis encompasses experimental and computational investigations of this nanocatalyst. The activation mechanism of Rh,Pd/CeO2 nanocatalysts under ethanol steam reforming conditions is …
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A GAN-Augmented Machine Learning Framework for Predicting Raman Characteristics in Carbon Nanofiber Synthesis
… approach covering hydrocarbon decomposition, catalyst activation, and CNF growth mechanisms. Contributions include physics-informed feature extraction in syn-thesis phases, synthetic data generation to address small data sets, and the integration of machine learning models to predict the …
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Lewis base catalyzed enantioselective sulfenoamination of alkenes
The concept of Lewis base activation of Lewis acid has been successfully applied to the enantioselective sulfenoamination of olefins. The unreactive, achiral Lewis acidic sulfenylating agent, N-arylthiophthalimide, is activated by the coordination of a chiral Lewis base, binaphthyl-derived …
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Self-Condensing Ring-Opening Metathesis Polymerization
… Well-defined ruthenium-based olefin metathesis catalysts are common ROMP initiators due to their high stability, reactivity, and functional group tolerance. Thus, we studied the olefin metathesis catalyst activation temperature to enable ROMP initiator-monomer coupling. Based on the catalyst …
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Phosphinimide complexes of titanium: Synthesis and reactivity studies of a new family of organometallic compounds.
… out employing both aluminum- and boron-based co-catalysts. Some of the titanium-phosphinimides proved to be very active catalysts. Cationic titanium-phosphinimide complexes were isolated and the crystal structure of CpTiMe[NP(t-Bu)3][MeB(C6F5) 3] 95 was shown to be zwitterionic in nature. Some …
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Investigations of carbon nanotube catalyst morphology and behavior with transmission electron microscopy
… between question and answer by focusing on the catalyst particle used in common CNT growth procedures. Ostwald ripening studies on iron nanoparticles are performed in an attempt to link catalyst morphology during growth and CNT chirality (the structure aspect of a nanotube that determines its …
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Dry-transfer of chemical vapour deposited nanocarbon thin films
… oxide, aluminium and alumina diffusion barriers. Activations energies of 0.5 and 1.5 eV were extracted supporting surface diffusion limited catalysis for CNTs and CNFs. For the first time an activation energy of 2.4 eV has been determined for Cu-catalysed growth of CVD graphene. Graphene was shown …
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Investigation of the promotional effect of Cu and Ag on iron-based Fischer-Tropsch catalysts using ferrites as model catalysts
… The commercially used iron-based Fischer-Tropsch catalyst is supported on silica (Si), to improve the dispersion of the active metal and is promoted with small amounts of potassium to enhance the activity and selectivity of the catalyst and copper to enhance the reducibility of the iron oxide. …
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NMR/MRI SIGNAL ENHANCEMENT BY REVERSIBLE EXCHANGE (SABRE) AND HETEROGENEOUS SABRE (HET-SABRE)
… Green, and co-workers where an organometallic catalyst is used to co-locate parahydrogen (pH2) and a molecular substrate to be hyperpolarized. Like traditional PHIP, SABRE is of interest because it is cost-effective, potentially continuous, scalable, and rapid (achieving polarization …
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Simulated solar light assisted photocatalytic degradation of organic matters
… by the narrow wavelength spectrum for photonic activation of catalysts. The higher-end of ultraviolet (UV) spectrum required for catalyst activation is usually accompanied by high operation costs. From the viewpoint of solar energy utilization, the development of photocatalysis under …
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Metal complexes with ω-alkenyl ligands. synthesis, structure, reactivity, and applications in chemical vapor deposition (CVD) and hydrosilylation catalysis
… of lithium clusters. Finally, we point out that activation enthalpies can be obtained solely from NMR line shapes above the coalescence point. Chapter 3 describes the synthesis and characterization of three platinum(II) ω-alkenyl complexes of stoichiometry Pt[CH2CMe2(CH2)xCH=CH2]2 where x is 0, …